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Finding the Fourth Proportional to 136,128.60, 203,706.90 and 86,232.60

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Solution

The fourth proportional to 136,128.60, 203,706.90 and 86,232.60 is: 129,041.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,128.60 : 203,706.90 = 86,232.60 : x
  2. Step 2: Convert to fraction form
    136,128.60/203,706.90 = 86,232.60/x
  3. Step 3: Cross multiply
    136,128.60x = 203,706.90 × 86,232.60
  4. Step 4: Simplify right side
    136,128.60x = 17,566,175,624.94
  5. Step 5: Solve for x
    x = 17,566,175,624.94/136,128.60
  6. Step 6: Final answer
    x = 129,041.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.